Improvement in stop-cooks



figluteh tatzs geteilt @fitta Letters Patent 1Y0. 76,106, dated Merch31, 1868; antedated .March 18,1868.

IMPROVEMENT IN STOP-GOGKS.

. ein ngettltntnnh tt in .tlgttthttas ttett ttt mating gaat uitge stmt.

TO ALL WHOM IT MAY CONCERN:

Be it known that we, CARL SGHULTZ and THOMAS Wannen, of the city,county, aud'State of New York, have invented a new and usefulImprovement in Step-Cocks; and we do' hereby declare that the followingis a.

full, clear, and exact description thereof, which-will enable thoseyskilled in the art to malte and use the samt',

reference being had to the accompanying drawing forming'-part of thisspecification, in which drawing- Figure 1 represents a longitudinalcentral section of this invention.

Figure 2 is-a detached plane of the valve in a larger sealethan theprevious figure.

Similar letters indicate corresponding partsA This invention relates toa. stop-cock, the' body of which is made of glass or other vitreousmaterial, and provided with a flat or conical. seat, against whichthevalve is pressed by means of a screw-handle lever or other suitabledevice, in such a manner that a stopcock is obtained whieh is easilykept tight, evenagainst liquid or fluid` under a high pressure, andwhich is so constructed that the liquid or fluid in discharging will'pass entirely through glass, and'will not be permitted to come incontact with any metal or other materialliable to impart to the same animpure tastcor deleterious properties.

The valve is composed of a. disk of leather, `In'diaruhber, or othersuitable soft material, which is secured to vthe end of a metal .stem bymeans of a button, formed at the end of said stem, and dropped into acircular recess in the disk,y said recess being provided withlips,lwhich catch over the edge of the button and retain the sameiirmlyin position, without, however, preventing it from turning on thebutton in suchia manner that the valve can always be firmly vpressed upagainst the scat, and a close it is obtained without danger of splittingthe vitreous body of the stop-cock. l

A represents the h ody of ourstop-cock, whichis made of glass, or someother vitreous material. This'body is provided with a. channel, a, the4outer end of which ils'enlarged so as to form a recess, c, and seat, b,for the valve B. From the recess e, and close to the seat b, extends alateral channel, cl, which communicates with the discharge-spout C, andin practice this lateral channel will be made somewhat largerv than thechannel c; in the body A, so that the liquid will discharge freely andwithout causing a back pressure on the valve. The spout G'is also madeof glass or other vitreousvmaterial, and it is either/made solid withthe body A, or connected to the saine by a suitable` cement. The recessc is -made cylindrical, just large enough to receive* the valve B,'which is composed of a disk ofleather, or other` suitable material,that is secured'to the end of the metallic stem D.

In the drawing a stem is shown, lwhich .is provided with a serew-thread,Z, and handle,f; the screw-thread being tappedv into a metal cap, "E,which is attached to the end of the body A, so that by turning thehandle the valve is moved toward and from the seat l. It mustberemarked; however, that, instead of the screw-handle, other means, -suchas knuckles or lever-handles, might be connected 'with the valveWithoiit changing the result.

'.lhe valve B is secured to the stern E by means of a huttomg, which isformed at the end ofsaid sten1,and which-drops into a circular recess,h, (see tig. 2,) in the valve B. Thisrecess is provided with lips t',and if the button has been ins'erted, these lips catch over the'inneredge thereof, and prevent the valve from coming oil spontaneously. Atthe same time the valve isfree to revolve on `the endof the stern, andit can be 'firmly forced up against its seat without being liable to becnt or injured. It will be secu that the lateral passage d is beyond thevalve-seat Z1 of the supply-channel; thus both passage and chanuel'willloe closed by the valve, and any fluid which may, esca-pe at thevalve-seat will be checked when it reaches the discharge-passage-ZA Theinner end of the body A of our stop-cock will be connected with afountain containing carbonio acid, watelyor other liquid or uid underpressure, and the connection will-be `effected by an elbow, also made ofglass orother vitreous material, so that the rliquid `er duid is notpermitted tocotne in contact with any other material but glass, and thedeleterious effectief stop-cocks made of brass or other metallicmaterial is avoided.

What we elaimas new,`and desire to secure by Letters Patent, is-

The stop-cock herein described, the same having its body'construeted ofglass or other vitreous material, with a valve, B, provided with recessk and lips i, for conn ection tothe operatng-stexn, and with a lateralpassage', d, beyond the valve-seat of the supply-channel a, the samevalve an'd closing the passage a by its direct thrust, and 'the channeld b y its lateral expansion, when all parts are constructed andoperating substantially as described.

CARL SCHULTZ, THOMAS WARKER.

Witnesses:

W. HAUFF, GEO. F. SOUTHERN.

thus having two faces :md two sats, i

